Sunday, November 25, 2012

STRUCTURE OF THE SKIN

Before you take care of your skin, the first you have to know and understand about the structure of your skin, then you can find out the best method skin care for your careness is good and achieve efficiency.

I. STRUCTURE OF THE SKIN:  The skin has three layers:

1.The Epidermis On The Outside:

  • The epidermis is striated squamous epithelium. The main cells of the epidermis are the keratinocytes, which synthesis e the protein keratin. And it is made from layers of cells with a basal layer, which is always forming new cells through cells division. The new cells gradually move towards the surface, which takes 1-2 months. As they move up they gradually die(we can't see this cells die by eyes), become flattened and develop keratin. 
  • Moving from the lower layers upwards to the surface  the four layers of the epidermis are:
    • Stratum basale( basal or germinativum cell layer): is the only layer but it is very especially because of ability to produce all another layer. Making up a small proportion of the basal cell population is the pigment( melanin ) producing melanoytes. The number and size of the pigment( melanin) will determine the color of your skin color, eyes color....
    • Stratum spinosum( spinous or prickle cell layer): is the thickness layer, as basal cells reproduce and mature, they move towards the outer layer of skin, initially forming the stratum spinosum.
    • Stratum granulosum(granular cell layer): Continuing their transition to the surface the cells continue to flatten, lose their nuclei and their cytoplasm appears granular at this level.
    • Stratum corneum(horny layer): Is the outermost layer include of the dead cells are destroyed, it si very easy to peel 
      • In addition, the stratum lucidum is a thin layer of translucent in thick epidermis.
  • Together, the stratum spinosum and stratum granulosum are sometime referred to as the Malphigian layer.
2. The Dermis: include:

  • The elastic fibres make your skin resilient.
  •  Connective tissue packs and bind the other structure in the skin.
  • Capillaries with a lot of tiny blood feed the skin.
  • Muscle fibres.
  • Sensory cells make the feeling of pain, cold, heat,pressure...
  • Nerve fibres.
  • Sweat glands which open under skin and onto the surface as pores.
  • Sebaceous glands produce oil to help waterproof the skin.
    • If the sebaceous glands are strong : is oil skin.
    • If the sebaceous glands are weak : is dry skin.
    • If they are regularly: is normal skin.
    • If it are strong at your forehead, nose, chin and weak at 2 cheek : is a combination skin.
3.THE FAT LAYER UNDER SKIN:
  • The fat layer under skin protect the skin from the effect of mechanical thermal insulation, energy reserves.


*Thank you for reading my blog!  wish you always have beautiful skin.































No comments:

Post a Comment